2Gholam R M. Growth parameters enhancing the competitive ability of corn (Zea mays L. ) against weeds[J]. Weed Biology and Manage- ment,2007,7 : 232 - 236.
3Subedi K D, Ma B L. Assessment of some major yield - limiting fac- tors on maize production in a humid temperate environment [ J ]. Field Crops Research ,2009,110:21 - 26.
4Alan M D. Weed control in glyphosate -tolerant maize in Europe [ J ]. pest management science,2009,65 : 1047 - 1058.
6Battaglin W A, Thurman E M, Kalkhoff S J, et al. Herbicides andtransformation products in surface waters of the Midwestern UnitedStates [ J ]. Journal of the American Water Resources Association, 2003,39:743 - 756.
7Food safety -from the farm to the fork[ EB/OL]. [2011 -02 -03]. http://ec, europa, eu/food/plant/protection/evaluation/index_en. htm.
8Heap I M. International survey of herbicide resistant weeds[EB/OL]. (2010 - 03 - 31 ) [ 2011 - 02 - 04 ]. http://www, weed- science, org/summary/MOASummary, asp.
9Culpepper A S. Glyphosate -induced weed shifts[ J]. Weed Tech- nology, 2006,20:277 - 281.
10Ruegg W T,Quadranti M,Zoschke A. Herbicide research and de- velopment :challenges and opportunities[J]. Weed Research,2007, 47:271 - 275.